Not reading ini file properly

[aduchene]

I'm using the counter example in the hpxc project.
When I use command line options to disable guard pages, it works. But when I use a ini file, it crashes. I've confirmed that the config file is read in below.

Sample output:

Using the following .hpx.ini
hpx.stacks.use_guard_pages=0

I get the following error
[14:48:42]:xand@deneb:/home/xand/stellar/hpxc/aduchene_build/bin:134:$ ./counter --hpx:dump-config

Configuration after runtime start:

[application]
[hpx]
'cmd_line' : './counter --hpx:dump-config'

[stacks]
'huge_size' : '0x2000000'
'large_size' : '0x0200000'
'medium_size' : '0x0020000'
'small_size' : '0x10000'
'use_guard_pages' : '0'

{what}: mmap() failed to allocate thread stack due to insufficient resources, /proc/sys/vm/max_map_count may be too low: HPX(unhandled_exception)
{version}: V0.9.5-trunk (AGAS: V2.1), Git: 3864ff6
{boost}: V1.50.0
{build-type}: debug
{date}: Jan 16 2013 12:32:11
{platform}: linux
{compiler}: GNU C++ version 4.6.2
{stdlib}: GNU libstdc++ version 20120120

With command line option:
[14:48:47]:xand@deneb:/home/xand/stellar/hpxc/aduchene_build/bin:134:$ ./counter --hpx:ini hpx.stacks.use_guard_pages=0
finished: counter=100000
I don't see any meaningful differences in the dumped config options.